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mpgtx(1)			  User manual			      mpgtx(1)

NAME
       mpgtx,  mpgsplit,  mpgcat, mpgjoin, mpginfo, mpgdemux - manipulate mpeg
       files

SYNOPSIS
       mpgtx command [ options ] file [ range | file ] ...

DESCRIPTION
       mpgtx can split and join MPEG files in various ways. Three  file	 types
       are  currently  handled	(more  to  come): MPEG 1 Video files, MPEG 1/2
       Audio files (mp1, mp2, and mp3), MPEG 1 System files (audio  and	 video
       files),	MPEG  2	 Program  files (Experimental), MPEG 2 Transport files
       (demultiplex and info modes only).  mpgtx is a GOP (Group of  Pictures)
       based  editor. This means that mpgtx cuts MPEG files on a Group Of Pic‐
       ture basis, not on a frame-by-frame basis. A typical  GOP  duration  is
       about  0.5  sec	(approx.  15 frames), limiting the maximum accuracy of
       mpgtx.

COMMANDS
       -i     prints information about files,  such  as	 duration,  dimention,
	      bitrate, etc.

       -j     joins files (ranges may be specified, see the RANGES section).

       -s     splits  files  according to the specified ranges (see the RANGES
	      section).

       -d     demultiplexes composite mpeg file.

       -T     manipulates ID3v1 tags from mp3 files (see tagmp3(1)).

       -h     prints a (not so) short help message.

       -v     prints version and exit.

       -#     where # is a number, splits the given files in # parts.

       --force
	      enables joining of incompatible files  (some  players  are  very
	      robust)

       --no-parachute
	      prevents	mpgtx  to try to catch SIGSEGV signal. This is usefull
	      for debugging.

       In addition, when invoked with the  names  mpgjoin,  mpgcat,  mpgsplit,
       mpgdemux,  tagmp3  or  mpginfo,	mpgtx will modify its behaviour in the
       following ways:
       mpginfo behaves as mpgtx -i
       mpgsplit behaves as mpgtx -s
       mpgjoin behaves as mpgtx -j
       mpgcat behaves as mpgtx -j -o -
       mpgdemux behaves as mpgtx -d
       tagmp3 behaves as mpgtx -T


OPTIONS
       -f     force overwriting of files, never ask.

       -Ax    Change aspect ratio of mpeg. Valid are  1,2,3,4  for  1:1,  4:3,
	      16:9, 2.2:1

       -P     Keep junk or unusual headers in splits

       -X     Desperate	 mode,	search	the  whole  movie for a valid PACK. In
	      addition with option -N no search information will be displayed,
	      only the end summary.

       -N     Suppress	progress  output to the console. Speeds up operation a
	      little on most Systems and much on Macintosh OS9.
	      Suppress time line check in mpginfo mode.

       -b NAME
	      each output file will have the basename NAME

       -o FILE
	      FILE will be used as the output file (used with  the  join  com‐
	      mand). if FILE is -, standard output will be used.

RANGES
       Each range must follow a filename or another range.  A range in an MPEG
       file can be specified using one of this three notations: Note  for  OSX
       Users: Ranges must be enclosed in single or double Quotes!

       [a-b]  from  value  a  inclusive to value b inclusive. If you want half
	      opened ranges, you may want to use ]a-b], [a-b[ or ]a-b[.

       [n/ntot]
	      the n th part out of ntot.  [1/4]	 would	result	in  the	 first
	      quarter of the specified file.

       {a-b-...}
	      with  a  ,  b , ...  in ascending order. Split specified file at
	      given boundaries. {55M} therefore means from beginnig of file to
	      55Megs and from 55Megs to the end of file.

VALID VALUES
       Values of ranges can be specified in seconds or as a byte offset.

       Time Format
	      HH:MM:SS.SS where the HH: part can be omited

       Offset Format
	      a number optionally followed by M for Megabytes k for kilobytes

       Omitted Values
	      An  empty	 value is valid and is equivalent to the corresponding
	      file boundary:
	      [-10M] are the first 10 Megabytes of the file.
	      [1:10:04-] from 1 hour 10 minutes 4 seconds to the end of file.

RETURN VALUE
       All programs return 0 upon successful completion and 1 on failure.

EXAMPLES
       mpgjoin movie1.mpg [-0:32] [45M-75M] movie2.mpg -o joined.mpg
	      joined.mpg will contain the first 32 seconds of movie1.mpg  fol‐
	      lowed  by	 30 Megs of movie1.mpg starting at 45 Megs followed by
	      the whole file movie2.mpg

       mpgtx -124 myfile.mpg -b output
	      will split myfile.mpg in 124 parts with names output-001.mpg  to
	      output-124.mpg

       mpgtx -i Wazzup.mp3
	      will print infos about given file such as duration, bitrate, but
	      also album, track, song name if this file has an ID3 tag.

       mpgcat myfile.mpg [2/2] | lpr
	      will redirect the second half of	myfile.mpg  to	your  printer,
	      emptying	it  from toner and paper and make you be fired by your
	      boss... Use carefully.

BUGS
       Plenty of them :)
       GOP (Group of Picture) based: well this is not a bug but it's a limita‐
       tion. As explained in the DESCRIPTION section, this limits the accuracy
       of mpgtx on joins and splits to approximately 15 frames,	 or  0.5  sec‐
       onds.
       Some  artifacts can be seen with bad MPEG players playing joined files.
       These players don't take into account the broken link flag used to dis‐
       card  the  first	 B  frames they encounter. This is a bug in their MPEG
       decoding engine, not mpgtx.

AUTHOR
       Laurent Alacoque <laureck@users.sourceforge.net> CopyLeft 2001.
       Modified by Chris Danis <danish@debian.org>, copyleft 2001.
       Philipp Biermann <philipp@biermann.org>, copyleft 2002.
       Erik Schanze <schanzi_@gmx.de>, copyleft 2004.
       Get new releases and information from, and send patches,	 bugs,	girls,
       money etc. to:
       http://mpgtx.sourceforge.net/

THANKS
       for your attention. Have a good day.
       Godmar  Back  and  Brent	 Phillips  helped  me to tune the command line
       interface.
       Volker Moell patiently teach me how to build rpms. Danke Volker.
       Jean Fransisco Sytem (alias Nicolas Schieli)  helped  me	 correct  some
       nasty bugs.
       Thank you guys.

Linux				 DECEMBER 2004			      mpgtx(1)
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